The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with sweet-tooth
A love for sugary foods, as in You can always please Nell with cake or ice cream; she has a big sweet tooth. This expression dates from the late 1300s, although it then referred not only to sweets but other delicacies as well.